Novel restoration and adaptation interventions including coral seeding and cloud brightening are subject to active research in the Great Barrier Reef (GBR) region and elsewhere. Little is known though about the feelings these evoke in members of the public (feelings such as hope, worry, fear, pride, etc.) nor how feelings toward emerging technologies influence acceptance and engagement. This study draws on three large-scale surveys (2018, 2022, 2024) of over 12,600 Australian adults, including a dedicated GBR-coastal sample, to track evolving emotional responses toward a range of reef interventions. Results reveal an overall tilt toward positive emotions (particularly hope), yet caution remains widespread and negative emotions, such as sadness and worry, have fluctuated over time—spiking in 2024 following earlier declines. Younger and socioeconomically vulnerable groups reported higher intensities of both positive and negative emotions, suggesting heightened sensitivity and potential for either activism or disengagement. Although statistically significant demographic differences emerged, effect sizes were modest. Our findings underscore the importance of recognising complex emotional drivers in marine conservation initiatives. By proactively addressing distinct emotional concerns and fostering shared hope, practitioners and policymakers can enhance public support and co-create more resilient, community-informed paths for GBR restoration and stewardship.